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Office of Scientific & Technical Information Technical Reports
337
Congressional Research Service Reports
118
Texas Attorney General Opinions
79
Texas Patents
46
Government Accountability Office Reports
28
Technical Report Archive and Image Library
17
National Advisory Committee for Aeronautics Collection
13
Texas Register
10
Texas State Publications
5
TRAIL Microcard Collection
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645 Matching Results
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Second Report on Liquid Metal Level Instrument
The liquid metal level instrument will operate at tank temperatures up to 1000 F. Overall system accuracy depends on operating conditions, as described in the report. Test accuracies from 2 to 8% have been obtained from full to empty tank. The primary detector unit successfully passed navy HI shock test.
Date:
December 21, 1954
Creator:
Droma, Clarence R.
Object Type:
Report
System:
The UNT Digital Library
Maritime Loop Irradiation Program Savannah I Fuel Irradiation Quarterly Progress Report: July 1, 1961-September 30, 1961
This report covers the S-I-5-B-M fuel irradiation in the GETR Maritime Loop during the first quarter of fiscal year 1962. The data are summarized in Section II.
Date:
December 21, 1961
Creator:
Danielson, D. W. & Gilbert, R. S.
Object Type:
Report
System:
The UNT Digital Library
Composing and Typecasting Machine
Patent for a composing machine utilizing the general principles of the linotype and similar composing and typecasting machines. It is used to provide a more compact machine of that general character for commercial use.
Date:
December 21, 1920
Creator:
French, Morris & Miller, Monroe E.
Object Type:
Patent
System:
The Portal to Texas History
Tractor-Coupling
Patent for tractor coupling. The object of the invention is to provide a coupling for tractor and plow. When a plow hits an obstruction, the coupling will automatically disengage tractor and plow without breaking any parts.
Date:
December 21, 1920
Creator:
Hart, Lawrence H.
Object Type:
Patent
System:
The Portal to Texas History
Huller
Patent for hullers for removing hulls of shells for seeds or other similar products. The invention "is of especial utility in hullers for cottons seeds." However, it is noted that a cotton seed huller is only one adaptation of the invention.
Date:
December 21, 1920
Creator:
Vardell, Arthur A. & Highland Gee Vardell
Object Type:
Patent
System:
The Portal to Texas History
Process of Vaporizing Liquids.
Patent for an engine designed for combustion of kerosene with air. The patent notes improvements for regulating the mixture ratios and maximizing efficiency by heating the air intake.
Date:
December 21, 1920
Creator:
McClintock, Charles Davis
Object Type:
Patent
System:
The Portal to Texas History
Tire-Core.
Patent for a tire core with interlocking sections that can be removed easily from built tires to reuse, including illustrations.
Date:
December 21, 1920
Creator:
Gillette, Walter S.
Object Type:
Patent
System:
The Portal to Texas History
Tire.
Patent for a removable replacement tire. To provide simple and easy removable tires to replace the old ones.
Date:
December 21, 1920
Creator:
Ford William R.
Object Type:
Patent
System:
The Portal to Texas History
Power-Transmitting Device
Patent for improvements in power-transmitting devices: convert rotary movement into reciprocatory movement (lines 14 - 15); the speed of movement of the reciprocating member in one direction is greater than in the opposite directions (lines 20-24); and increased pull (line 30).
Date:
December 21, 1920
Creator:
Huffman, Orla L.
Object Type:
Patent
System:
The Portal to Texas History
Fishing-Tool
Patent for a fishing tool that is "light, and of simple construction... (line 37)." The fishing tool is also meant to be let down into well bores without the rods or tubing getting stuck and automatically locks.
Date:
December 21, 1920
Creator:
McMillian, John F.
Object Type:
Patent
System:
The Portal to Texas History
Feasibility Study for Development of Statewide Evapotranspiration Network
Provide guidance to Texas Development Water Board in the build-out and operation of a statewide evapotranspiration network.
Date:
December 21, 2017
Creator:
Nielsen-Gammon, John W.; Fipps, Guy; Caldwell, Todd; McRoberts, D. Brent & Conlee, Don
Object Type:
Report
System:
The Portal to Texas History
Ozone and Nitrogen Oxide Production by Irradiation of Air
In regard to the production of ozone and various nitrogen oxides in air by action of x-rays or gamma rays, thre seems to be no direct experimental data which can be used. There is some data on the action of alpha particles on air and some on the action of cathode rays.
Date:
December 21, 1950
Creator:
Newton, A. S.
Object Type:
Report
System:
The UNT Digital Library
The Xu-Tec process of introducing normally solid materials into substrate surfaces
Most of the initial alloying work has been with the interior of pipe segments. The source electrode, an Inconel 625 rod, was inserted into carbon steel pipe segment cathode. Alloy layers were deposited on the interior surfaces of these segments; maximum thickness (8 [mu]) was obtained for a potential difference of 200 V.
Date:
December 21, 1992
Creator:
Xu, Zhong.
Object Type:
Report
System:
The UNT Digital Library
Design and simulation of the first blanket zone of the DEMO fusion device
An evaluation of the proposed design for the first blanket zone of the DEMO fusion device at Oak Ridge National Laboratory was performed by determining temperature profiles for a number of possible design geometries. Only one design configuration was acceptable and further evaluated by determining two-dimensional steady state temperature and tritium concentration profiles within the unit. The transient response of this design during periods of plasma shutdown was also determined to evaluate the maximum and minimum possible stress on the stainless steel cooling tubes. The preponderance of unacceptable designs of those investigated led to the recommendation that future studies consider only modules less than 25 cm thick and coolant temperature rises less than 67/sup 0/C.
Date:
December 21, 1976
Creator:
Lee, J. H.; Dweck, J. S. & Kraftick, K. A.
Object Type:
Report
System:
The UNT Digital Library
Magnetic susceptibility and neutron diffraction investigation of. cap alpha. -/sup 242/Pu
Magnetic susceptibility and neutron diffraction measurements were made on a high purity, polycrystalline sample of ..cap alpha..-phase /sup 242/Pu. The susceptibility results show the existence of weak ferromagnetism below 50/sup 0/K. This suggests that the ..cap alpha..-phase is antiferromagnetic, the observed ferromagnetic moment (9.5 x 10/sup -4/ emu per gram of sample at 4.35/sup 0/K) originating within antiferromagnetic domain walls. No evidence for antiferromagnetic ordering was observed in the neutron diffraction study suggesting that the moment per Pu atom is too small to observe with this technique.
Date:
December 21, 1970
Creator:
Sparks, J. T.; Komoto, T. & Ramsey, W. J.
Object Type:
Report
System:
The UNT Digital Library
Neutron absorption lithium detector
It is planned to manufacture ceramic target elements for use in N-Reactor. The potential exists for overdilution of the lithium-aluminate with aluminum powder. One method of nondestructively determining the target element type is by neutron absorption. This technique makes use of the different thermal neutron cross sections of aluminum and lithium. The target element to be tested is placed between a neutron counter and a neutron source--the neutron count with the unknown sample is then compared with that of a standard. An experiment was conducted to determine if a neutron absorption instrument could be used to identify a lithium or aluminum target element. A sketch of the test arrangement is shown. Test results are presented.
Date:
December 21, 1965
Creator:
Dozer, B. E.
Object Type:
Report
System:
The UNT Digital Library
Texas Preventable Disease News, Volume 45, Number 51, December 21, 1985
Newsletter of the Texas Bureau of Disease Control and Epidemiology discussing the news, activities, and events of the organization and other information related to health in Texas.
Date:
December 21, 1985
Creator:
Texas. Bureau of Disease Control and Epidemiology.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
A Revised Magnitude and Distance Amplitude Correction (MDAC2) Procedure for Regional Seismic Discriminants: Theory and Testing at NTS
The Magnitude and Distance Amplitude Correction (MDAC; Taylor and Hartse, 1998; Taylor et al., 2002) procedure for correcting regional seismic amplitudes for seismic event identification has been modified to include more realistic earthquake source models and source scaling. In the MDAC2 formulation we generalize the Brune (1970) earthquake source spectrum to use a more physical apparent stress model that can represent non-constant stress-drop scaling. We also event include a parameter that allows for variable P-wave and S-wave comer frequency scaling, imposing some of the constraints of ratio correction techniques (Rodger and Walter, 2002). Very Stable moment magnitude measures (Mayeda et al., 2002) from regional coda wave envelopes that have been tied to independently derived regional seismic moments are incorporated. This eliminates two fitting parameters that were necessary in relating seismic moment to magnitude. The incorporation of Bayesian tomography to replace the assumption of a constant Q0 model is also described. These modifications allow for more flexibility in the MDAC grid-search procedure. The direct tie to regional seismic moment rather than body wave magnitude reduces effects of upper mantle bias on the corrected amplitudes. In this paper, we develop the theory and test the formulation on Nevada Test Site (NTS) data.
Date:
December 21, 2001
Creator:
Walter, W R & Taylor, S R
Object Type:
Report
System:
The UNT Digital Library
Coarse-Grained Molecular Dynamics and Multiscale Modeling of NEMS Resonators
We review concurrent multiscale simulations of dynamic and temperature-dependent processes found in nanomechanical systems coupled to larger scale surroundings. We focus on the behavior of sub-micron Micro-Electro-Mechanical Systems (MEMS), especially microresonators. These systems are often called NEMS, for Nano-Electro-Mechanical Systems. The coupling of length scales methodology we have developed for MEMS employs an atomistic description of small but key regions of the system, consisting of millions of atoms, coupled concurrently to a finite element model of the periphery. The model, Coarse-Grained Molecular Dynamics (CGMD), builds a generalized finite element formalism from the underlying atomistic physics in order to ensure a smooth coupling between regions governed by different length scales. The result is a model that accurately describes the behavior of the mechanical components of MEMS down to the atomic scale.
Date:
December 21, 2001
Creator:
Rudd, R E
Object Type:
Article
System:
The UNT Digital Library
Coarse-Grained Molecular Dynamics: Dissipation Due to Internal Modes
We describe progress on the issue of pathological elastic wave reflection in atomistic and multiscale simulation. First we briefly review Coarse-Grained Molecular Dynamics (CGMD). Originally CGMD was formulated as a Hamiltonian system in which energy is conserved. This formulation is useful for many applications, but recently CGMD has been extended to include generalized Langevin forces. Here we describe how Langevin dynamics arise naturally in CGMD, and we examine the implication for elastic wave scattering.
Date:
December 21, 2001
Creator:
Rudd, R E
Object Type:
Article
System:
The UNT Digital Library
Conversion and optimization of the parameters from an extended form of the ion-interaction model for Ca(NO3)2(aq) and NaNO3(aq) to those of the standard Pitzer model, and an assessment of the accuracy of the parameter temperature representations
The electrolytes Ca(NO{sub 3}){sub 2}(aq) and NaNO{sub 3}(aq) are both extremely soluble but differ in several important respects. Ca(NO{sub 3}){sub 2}(aq) has complex behavior at low ionic strengths and forms several thermodynamically stable and metastable solid phases, whereas NaNO{sub 3}(aq) forms only an anhydrous solid phase. The thermodynamic properties of both have previously been modeled using extended Pitzer ion-interaction models that include higher-order virial terms, in addition to those of the standard Pitzer model. The parameters of the original Pitzer model, however, are often needed for thermodynamic modeling calculations. In this paper we convert the parameters of the extended ion-interaction models for Ca(NO{sub 3}){sub 2}(aq) and NaNO{sub 3}(aq) to the standard Pitzer model using an extension of the methodology previously described by Rard and Wijesinghe [J. Chem. Thermodynamics 35 (2003) 439.473]. In this variant, the exponential coefficient {alpha}{sub 1}{sup P} of Pitzer's model is also optimized to yield the most accurate overall representation of the osmotic coefficients {phi} over the ionic strength and temperature ranges of interest. The optimal values of {alpha}{sub 1}{sup P} = 0.87 kg{sup 1/2} {center_dot} mol{sup -1/2} for Ca(NO{sub 3}){sub 2}(aq) and {alpha}{sub 1}{sup P} = 1.43 kg{sup 1/2} {center_dot} mol{sup -1/2} for NaNO{sub 3}(aq) are …
Date:
December 21, 2004
Creator:
Wijesinghe, A M & Rard, J A
Object Type:
Article
System:
The UNT Digital Library
Hot Electron Diagnostics using X-rays and Cerenkov Radiation
The propagation of laser-generated hot electrons through matter and across narrow vacuum gaps is studied. We use the ATLAS titanium-sapphire laser of Max-Planck-Institut fuer Quantenoptik to irradiate 10 {proportional_to}m to 100 {proportional_to}m thick copper foils at intensities up to 10{sup 19} W/cm{sup 2}, generating electrons with temperatures in the MeV-range. After propagating through the target the electrons are detected via Cerenkov radiation generated in a suitable medium and by hard X-rays emitted from an X-ray ''fluor''. In some experiments a plastic scintillator was used to monitor the electrons. These diagnostics allow to characterize the electrons with respect to their energy, number and directionality. We also investigate the propagation of the hot electrons across narrow vacuum gaps, with a width ranging from several 100 {proportional_to}m down to 25 {proportional_to}m. The effect of self-generated fields in preventing electrons to cross the gap is demonstrated. Implications of these experiments with respect to pumping of X-ray lasers, isochoric heating by X-rays and developing optics for 4th-generation light sources will be discussed.
Date:
December 21, 2003
Creator:
Stein, J.; Fill, E. E.; Pretzler, G.; Brandl, F.; Kuba, J. & Habs, D.
Object Type:
Article
System:
The UNT Digital Library
Comparison of Four Parallel Algorithms For Domain Decomposed Implicit Monte Carlo
Four different algorithms for domain decomposed Monte Carlo are outlined, and the performance of each is measured. These algorithms are implemented in the KULL IMC package [4] running inside of ALEGRA [1]. This package implements the Implicit Monte Carlo (IMC) scheme for thermal radiation transport of Fleck and Cummings [3].
Date:
December 21, 2004
Creator:
Brunner, T; Urbatsch, T; Evans, T & Gentile, N
Object Type:
Article
System:
The UNT Digital Library
Modeling of the Deformation of Living Cells Induced by Atomic Force Microscopy
We describe finite element modeling of the deformation of living cells by atomic force microscopy (AFM). Cells are soft systems, susceptible to large deformations in the course of an AFM measurement. Often the local properties, the subject of the measurement, are obscured by the response of the cell as a whole. The Lagrangian finite deformation model we have developed and implemented in finite elements analysis offers a solution to this problem. The effect of the gross deformation of the cell can be subtracted from the experimentally measured data in order to give a reproducible value for local properties. This facilitates concurrent experimental efforts to measure the mechanical properties at specific receptor sites on the membrane of a living cell.
Date:
December 21, 2001
Creator:
Rudd, Robert E.; McElfresh, Michael; Baesu, Eveline; Balhorn, Rod; Allen, Michael J. & Belak, James
Object Type:
Article
System:
The UNT Digital Library